Saint Mary's University

About: Saint Mary's University is a education organization based out in Halifax, Nova Scotia, Canada. It is known for research contribution in the topics: Population & Stars. The organization has 1931 authors who have published 4993 publications receiving 143226 citations.

One-Neutron Removal Measurement Reveals O-24 as a New Doubly Magic Nucleus

Abstract: The first measurement of the momentum distribution for one-neutron removal from O-24 at 920A MeV performed at GSI, Darmstadt is reported. The observed distribution has a width (FWHM) of 99 +/- 4 MeV/c in the projectile rest frame and a one-neutron removal cross section of 63 +/- 7 mb. The results are well explained with a nearly pure 2s(1/2) neutron spectroscopic factor of 1.74 +/- 0.19 within the eikonal model. This large s-wave probability shows a spherical shell closure thereby confirming earlier suggestions that O-24 is a new doubly magic nucleus.

Rational Expectations, Market Fundamentals and Housing Price Volatility

Abstract: This paper derives a forward-looking rational expectations house price model and empirically tests its ability to explain short-run fluctuations in real house prices. A novel approach to proxying the imputed rents of owner-occupied housing, as a function of observable housing market fundamentals, is combined with a housing market arbitrage relation to derive a present value model for real house prices. Tests of the rational expectations, nonlinear cross-equation restrictions reject the joint null hypothesis of rational expectations and the asset-based housing price model for quarterly, single-detached house prices in the city of Vancouver, British Columbia from 1979–1991. The model fails to fully capture observed house price dynamics in two real estate booms but tracks real house prices well in less volatile times, suggesting that prices may temporarily deviate from fundamental values in real estate price cycles.

1H 0707-495 in 2011: an X-ray source within a gravitational radius of the event horizon

Abstract: The narrow-line Seyfert 1 Galaxy 1H 0707−495 went into a low state from 2010 December to 2011 February, discovered by a monitoring campaign using the X-Ray Telescope on the Swift satellite. We triggered a 100 ks XMM-Newton observation of the source in 2011 January, revealing the source to have dropped by a factor of 10 in the soft band, below 1 keV, and a factor of 2 at 5 keV, compared with a long observation in 2008. The sharp spectral drop in the source usually seen around 7 keV now extends to lower energies, below 6 keV in our frame. The 2011 spectrum is well fitted by a relativistically blurred reflection spectrum similar to that which fits the 2008 data, except that the emission is now concentrated solely to the central part of the accretion disc. The irradiating source must lie within 1 gravitational radius of the event horizon of the black hole, which spins rapidly. Alternative models are briefly considered, but none has any simple physical interpretation.

Organizational Injustice and Psychological Strain.

Abstract: Tout en considerant l'injustice percue comme une forme de stress et en tenant compte de la variable de l'insecurite d'emploi, nous avons examine les relations principales et interactives propres aux injustices en matiere d'interaction, de procedure et de categorie, et la fatigue psychologique. Une analyse de regression multiple soumise a un echantillon de 1 083 employes du gouvernement nous a permis de demontrer que les injustices en matiere d'interaction, de procedure et de categorie sont toutes des variables independantes de la fatigue psychologique qui peuvent expliquer une variance unique significative differente de celle de l'insecurite d'emploi. Les personnes qui percoivent, dans leur milieu de travail, un plus grand nombre d'injustices en matiere d'interaction, de procedure et de categorie rapportent une fatigue plus intense. Cependant, aucun effet interactif significatif n'a ete observe, ce qui donne a penser que ces trois categories d'injustice percue n'interviennent pas dans la prediction des symptomes de fatigue psychologique.